Appeal No. 1999-1393 Application No. 08/242,344 Notwithstanding this lack of assurance that a human homolog could be successfully retrieved the examiner believes that an artisan of ordinary skill would have expected to retrieve a human GluR5-2 homolog having several conservative and nonconservative substitutions relative to the rat sequence. We are left to guess at which EAA3 subtype (e.g. EAA3a, EAA3b, EAA3c, or EAA3d) this homolog would represent. In our opinion, more is required than merely a high level of homology between GluR5-2 and EAA3a-b to suggest the use of techniques disclosed by Puckett to obtain DNA encoding any one of EAA3a-d. We compare the factual evidence before us, in this case, with the factual record present in Ex parte Goldgaber, 41 USPQ2d 1172 (Bd. Pat. App. & Int. 1995) where a rejection based on the rationale applied in this case was affirmed. In Goldgaber, in addition to providing the methodology of isolating, identifying and sequencing a DNA that would encode a known polypeptide, the prior art indicated that the polypeptide for which the DNA was sought had been purified and the amino acid sequence was known. (Goldgaber at 1173). There was also information and guidelines as to the preparation of degenerate oligonucleotide probes based upon that known amino acid sequence which would have been useful in the disclosed isolation process. (Id. at 1174). On the record before us, and as argued by appellants, the proteins of the claimed invention were not known to be present in humans. Further, the examiner has provided no evidence which would provide a reasonable suggestion, motivation, or direction which would have led one of ordinary skill in this art to use the techniques of Puckett to isolate and identify the DNA sequences which would 18Page: Previous 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 NextLast modified: November 3, 2007